我尝试执行代码
#include <quadmath.h>
#include <iostream>
int main()
{
char* y = new char[1000];
quadmath_snprintf(y, 1000, "%Qf", 1.0q);
std::cout << y << std::endl;
return 0;
}
带命令
g++ test.cpp -o test
我收到错误:
/tmp/cctqto7E.o: In function `main':
test.cpp:(.text+0x51): undefined reference to `quadmath_snprintf(char*, unsigned int, char const*, ...)'
collect2: ld returned 1 exit status
版本是:
g++ --version
g++ (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
我该如何解决问题?
答案 0 :(得分:4)
我看到了同样的行为:
~/coding/q$ g++ test.cpp -lquadmath
/tmp/ccYdHwL5.o: In function `main':
test.cpp:(.text+0x51): undefined reference to `quadmath_snprintf(char*, unsigned int, char const*, ...)'
collect2: ld returned 1 exit status
一种解决方法是使用此模式包含标题:
extern "C" {
#include "quadmath.h"
}
之后:
~/coding/q$ g++ test.cpp -lquadmath
~/coding/q$ ./a.out
1.000000